re: Big Ten hands down punishment: Jim Harbaugh not allowed on the sidelines during games

It makes zero sense that it’s against the rules to scout future opponents live and get their signals that way, but you can communicate with a previous opponent of a future opponent and get the signals from them. Isn’t the point of making it against the rules to prevent the competitive advantage of knowing your opponent’s signs going into a game? How does it matter how you received that info?